Patents by Inventor Andre Lantz

Andre Lantz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5202509
    Abstract: The catalysts according to the invention are mixtures of an antimony trihalide and of a titanium tetrahalide.These catalysts can be used for the liquid phase fluorination of halogenated aliphatic hydrocarbons, especially that of chlorinated ethane and ethylene derivatives.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: April 13, 1993
    Assignee: Societe Atochem
    Inventors: Charles Laviron, Andre Lantz
  • Patent number: 5198199
    Abstract: To recover the antimony contained in a solution of use antimony-containing catalyst, emananting from units for the fluorination or chlorofluorination of halogenated hydrocarbons comprising at least two carbon atoms, the solution is concentrated to the limit of distillation of antimony trichloride, an excess of chlorine is then added to convert SbCl.sub.3 to SbCl.sub.5, and SbCl.sub.5 is distilled under reduced pressure without exceeding 120.degree. C.The recoverd antimony pentachloride is sufficiently pure to be able to be recycled directly to the fluorination reactor.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: March 30, 1993
    Assignee: ELF Atochem S.A.
    Inventors: Eric LaCroix, Andre Lantz
  • Patent number: 5055624
    Abstract: The invention relates to the selective manufacture of 1,1-dichloro-1,2,2,2-tetrafluoroethane by catalytic fluorination of 1,1,1-trichloro-2,2,2-trifluoroethane with anhydrous hydrofluoric acid.The reaction is carried out in the liquid phase at a temperature of between 70.degree. and 170.degree. C. and under a pressure of between 10 and 80 bars absolute, in the presence of an antimony-containing catalyst.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: October 8, 1991
    Assignee: Atochem
    Inventors: Andre Lantz, Bernard Cheminal
  • Patent number: 4983769
    Abstract: Perfluoroalkyl amine oxides of the following formula: ##STR1## where C.sub.n F.sub.2n+1 is a straight or branched perfluorinated chain, n is a whole number from 1 to 20, a is a whole number from 2 to 10, p is a whole number from 0 to 10, R.sub.1 is either a hydrogen atom or an alkyl radical having 1 to 6 carbon atoms, and R.sub.2 and R.sub.3 are alkyl radicals having 1 to 6 carbon atoms, and the use of the amine oxides as surface active agents particularly in fire extinguishing compositions.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: January 8, 1991
    Assignee: P C U K Produits Chimiques Ugine Kuhlmann
    Inventors: Rene Bertocchio, Louis Foulletier, Andre Lantz
  • Patent number: 4912269
    Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes, CnF.sub.2n+1 -Br (n=1 to 20).Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride, C.sub.n F.sub.2n+1 -SO.sub.2 Cl, in the presence of a catalyst consisting of a tertiary amine or phosphine or a quaternary ammonium or phosphonium salt, at a temperature ranging from 80.degree. to 200.degree. C.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: March 27, 1990
    Assignee: Atochem
    Inventors: Gilles Drivon, Pierre Durual, Bernard Gurtner, Andre Lantz
  • Patent number: 4849555
    Abstract: The invention relates to a process for the manufacture of 1-chloro-1,1-difluoroethane in the liquid phase by reacting hydrofluoric acid with 1,1,1-trichloroethane and/or 1,1-dichloro-1-fluoroethane.The selectively is improved by using a perfluoroalkanesulphonic acid, in particular trifluoromethanesulphonic acid, as a catalyst.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: July 18, 1989
    Assignee: Societe Atochem
    Inventors: Bernard Cheminal, Andre Lantz
  • Patent number: 4845300
    Abstract: The subject of the invention is a process for the preparation of 2-(perfluoroalkyl)ethanethiols R.sub.f CH.sub.2 CH.sub.2 SH, R.sub.f denoting a straight-chain or branched perfluoroalkyl radical containing from 2 to 20 carbon atoms. The proceses comprises reacting a 2-(perfluoroalkyl)ethyl iodide with thiourea and then decomposing the isothiouronium salt formed with an alkaline base, and is characterized in that it is carried out in a non-alcoholic inert solvent.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: July 4, 1989
    Assignee: Societe Atochem
    Inventor: Andre Lantz
  • Patent number: 4800234
    Abstract: The invention relates to the preparation of 1,1,2,2-tetrahydroperfluoroalkanols and their esters.A 2-(perfluoroalkyl)ethyl iodide is oxidized using peroxomonosulphuric acid or peroxodisulphuric acid in a carboxylic acid or carboxylic acid ester.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: January 24, 1989
    Assignee: Societe ATOCHEM
    Inventors: Andre Lantz, Pascal Michaud
  • Patent number: 4791223
    Abstract: The invention relates to the synthesis of 1,1,2,2-tetrahydroperfluoroalkanols and their esters by oxidizing a 2-(perfluoroalkyl)ethyl iodide using hydrogen peroxide in a carboxylic acid or carboxylic acid ester in the presence of sulphuric acid.In the process according to the invention, from 1 to 30 moles of sulphuric acid, from 1 to 50 moles of carboxylic acid or of an ester of such an acid, and from 3 to 20 moles of hydrogen peroxide per mole of 2-perfluoralkyl)ethyl iodide are used.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: December 13, 1988
    Assignee: Societe Atochem
    Inventors: Andre Lantz, Pascal Michaud
  • Patent number: 4721812
    Abstract: Novel 2,2-bis(2-perfluoroalkylethylthio)acetaldehydes having the formula: ##STR1## wherein R.sub.F and R'.sub.F are the same or different perfluoroalkyl groups, together with processes for producing the same and using the same to prepare surface active agents and products with hydrophobic and lipophobic properties.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: January 26, 1988
    Assignee: Atochem
    Inventors: Brigitte Bertaina, Aime Cambon, Andre Lantz
  • Patent number: 4717744
    Abstract: Fluorinated telomers which can be defined by the formula:R.sub.F --C.sub.m H.sub.2m --(CH.sub.2 --CR.sub.1 R.sub.2).sub.n X (I)wherein R.sub.F is a poly- or perfluorinated radical; X is iodine, chlorine or bromine; m is 0, 1 or 2; n is from 5 to 1000; R.sub.1 is hydrogen or methyl; and R.sub.2 is a --COOH or --CONR.sub.3 R.sub.4 group, R.sub.3 and R.sub.4 being hydrogen or alkyl or hydroxyalkyl radicals, such telomers being obtained by free radical reaction of an ethylenic monomer CH.sub.2 .dbd.CR.sub.1 R.sub.2 with a fluorinated telogen R.sub.F --C.sub.m H.sub.2m --X, and being excellent surfactants in aqueous media with special usefulness as additives to fire-fighting protein-based emulsifiers.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: January 5, 1988
    Assignee: Atochem
    Inventors: Bernard Boutevin, Yves Pietrasanta, Mohamed Taha, Andre Lantz
  • Patent number: 4683339
    Abstract: Novel 2,2-bis(2-perfluoroalkylethylthio)acetaldehydes having the formula: ##STR1## wherein R.sub.F and R'.sub.F are the same or different perfluoroalkyl groups, together with processes for producing the same and using the same to prepare surface active agents and products with hydrophobic and lipophobic properties.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: July 28, 1987
    Assignee: Atochem
    Inventors: Brigitte Bertaina, Aime Cambon, Andre Lantz
  • Patent number: 4613708
    Abstract: This invention concerns new branched perfluoroalkylated ethenes, their preparation and their use, in the form of aqueous emulsions, as oxygen carriers, and in particular as blood substitutes or as perfusion agents for the preservation of organs before transplant.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: September 23, 1986
    Assignee: Produits Chemiques Ugine Kuhlmann
    Inventors: Jean Riess, Francois Jeanneaux, Maurice Le Blanc, Andre Lantz
  • Patent number: 4613681
    Abstract: This invention relates to a process for the preparation of a fluorinated compound of the general formulaR.sub.F C.sub.2 H.sub.4 ORcomprising reacting an iodide of the general formula R.sub.F C.sub.2 H.sub.4 I with a percarboxylic acid of the general formula R.sup.1 CO.sub.3 H at a temperature and for a time sufficient to form said fluorinated compound; in said formulae R.sub.F is a straight or branched chain perfluorinated radical containing 1 to 20 C atoms, R is a hydrogen atom or --COR.sup.1, and R.sup.1 is a hydrogen atom or an aliphatic or aromatic hydrocarbon radical.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: September 23, 1986
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Louis Foulletier, Andre Lantz
  • Patent number: 4594177
    Abstract: Demoisturizing composition used for the displacement of liquid water, comprising a chlorofluorocarbon that is liquid at room temperature, containing a surface-active agent responding to the formula: ##STR1## in which R is an alkyl group in C.sub.6 -C.sub.18R' is an alkyl group in C.sub.1 to C.sub.2R" is an alkyl group in C.sub.1 to C.sub.18p is a value ranging between 1 and 2characterized in that the surface-active composition is prepared by mixing the following three constituents: ##STR2## where R.sub.F represents a straight or branched perfluorinated alkyl chain of formula C.sub.q F.sub.2q+1 in which q is a whole number ranging between 2 and 20 and where X is a divalent bond group that may be partially halogenated and R.sub.1 and R.sub.2 represent a hydrogen atom, an alkyl radical or a hydroxyalkyl radical, containing less than 6 carbon atoms.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: June 10, 1986
    Inventors: Andre Lantz, Henri Mathais, Gerard Dupuis
  • Patent number: 4383929
    Abstract: A fluorinated sulphobetaine compound of the general formula ##STR1## wherein R.sub.F represents a straight-chained or branched perfluorinated aliphatic chain C.sub.n F.sub.2n+1 (n being an integer between 1 and 20), a is an integer between 0 and 10, X is CO or SO.sub.2, p is an integer between 0 and 10, R.sub.1 is a hydrogen atom or an alkyl group containing 1 to 6 carbon atoms, R.sub.2 and R.sub.3 are each alkyl radicals containing 1 to 6 carbon atoms, and Z is a bivalent organic group; and fire extinguishing compositions comprising such fluorinated sulphobetaine compounds.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: May 17, 1983
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Rene Bertocchio, Louis Foulletier, Andre Lantz
  • Patent number: 4221734
    Abstract: A process is disclosed for the preparation of derivatives of perfluoroalkanecarboxylic acids and perfluoroalkanesulphinic acids by reacting a perfluoroalkylhalide having the general formula R.sub.F X, in which X represents an atom of chlorine, bromine, or iodine, and R.sub.F represents an unbranched or branched perfluorinated chain containing from 2 to 12 carbon atoms; with CO.sub.2 or SO.sub.2 in a solvent medium and in the presence of activated or unactivated zinc.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: September 9, 1980
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Auguste Commeyras, Hubert Blancou, Andre Lantz
  • Patent number: 3989843
    Abstract: Aqueous emulsions of polyfluorinated organic compounds useful as physiological transporters of oxygen, particularly in saline solutions isotonic with blood, are prepared by a method which comprises mixing a polyfluorinated compound with water or aqueous saline solution in the presence of at least one predominantly lipophilic polyfluorinated emulsifier and also at least one predominantly hydrophilic polyfluorinated emulsifier.
    Type: Grant
    Filed: October 22, 1974
    Date of Patent: November 2, 1976
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Pierre Chabert, Louis Foulletier, Andre Lantz